As every store is eager to let you know, gift cards can't be refunded for cash. So what should you do with that nice-but-misguided plastic? Cardnap offers a spot to sell your balance at a slight loss, as well as pick up other, more helpful gift cards at a discount.

Cardnap's primary function is to report on the best discounts, and the best selling prices, at gift card swapping spots like Plastic Jungle, Cardpool, and others. Type in a store name, browse through the discounted offerings, or hit the Sell section to see how much you can get for your remaining Cheesecake Factory balance. Free to use, the site claims no affiliation with any of the sites it scans, and there's a handy balance checker you can use for any card.